(Adds full-year details, background) Aug 29 (Reuters) -...

(Adds full-year details, background)

Aug 29 (Reuters) - Woolworths Ltd (WOW) reported a 9% rise in annual underlying profit on Thursday, helped by improved performance at its Australian Food division.

Australia's largest supermarket operator said net profit, excluding one-off items, rose to A$1.75 billion ($1.18 billion) in the year ended June 30, from A$1.61 billion a year earlier.

Analysts on average had expected a profit of A$1.74 billion, according to IBES data from Refinitiv.

Riding on stronger sales in the second half, comparable sales in the Australian Food segment rose 3.1% in the year, while the company's total revenue from continuing operations climbed 5.3% to A$59.98 billion.

The company's results were in contrast to rival Coles Group (COL) , which last week reported a drop in its annual profit. Coles had also warned that Woolworths' "Ooshies" collectibles programme could eat into its sales in the mid-term.

The two companies have been engaged in heavy discounting and turned to promotional programmes to prop up sales, offering collectable plastic figures with purchases above a certain value.

Net profit after significant items fell 7% for Woolworths, as the company took an impairment charge on the carrying value of its discount department store chain Big W.

Woolworths declared a final dividend of 57 Australian cents per share, compared with 50 Australian cents last year. ($1 = 1.4806 Australian dollars)